CN2262116Y

CN2262116Y - Vacuum control box for oil pump

Info

Publication number: CN2262116Y
Application number: CN 96235648
Authority: CN
Inventors: 徐琦; 范林; 魏永跃
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-04-09
Filing date: 1996-04-09
Publication date: 1997-09-10
Anticipated expiration: 2006-04-09

Abstract

The utility model relates to a vacuum control box for an oil pump, which comprises a power supply, a power supply lead-in switch circuit, a reactive power compensation circuit and an oil pump motor, wherein a vacuum switch circuit is connected in series with an output end of the power supply lead-in switch circuit and an input end of the reactive power compensation circuit. A multifunctional controller is connected in parallel with the control end of the vacuum switch circuit and the output end of the reactive power compensation circuit, and the control end of the multifunctional controller is connected to the oil pump motor. The utility model has advantages of high reliability, complete protection, low power consumption, less affection by environment and temperature, flexible and accurate action, etc.

Description

Pumping unit vacuum control case

The utility model belongs to the used control box of oil-field oil pumper, mainly plays the protection motor and runs well.

At present, the used control box of oil-field oil pumper is made up of power supply, power supply insertion switch, auxiliary reclay, the time relay, contactor, thermorelay, motor of oil extractor etc., main devices has 11 more than, because electrical apparatus element are many, circuit structure is complicated, and poor reliability, power consumption are many, and maintenance workload is big.Because pumping unit is operated in wild environment, so the temperature difference is big, cleaning condition is relatively poor.The thermorelay of finishing electromotor overload and open-phase protection is easily influenced by ambient temperature, and the rule that thermal field forms is destroyed, is difficult to play a protective role, and causes motor to damage, and makes the pumping unit can't ordinary production.

The purpose of this utility model provide a kind of reliability height, power consumption low, be subjected to environment and temperature effect little, can finish a kind of vacuum control case of every protections such as the phase failure, short circuit, overload, undervoltage and electric leakage to motor.

This purpose is to realize with following technical proposal: it comprises power circuit 1, power supply insertion switch circuit 2, reactive power compensation circuit 4, motor of oil extractor 6, is connected in series a vacuum switch circuit 3 with the reactive power compensation circuit input end at power supply insertion switch circuit output end; At vacuum switch circuit control end and reactive power compensation circuit output terminal and be connected to multifunctional controller 5, make its control end insert motor of oil extractor 6.Wherein vacuum switch circuit 3 is reached to pay by main control coil K, main switch K0 and helps K switch 01 to form; Reactive power compensation circuit 4 is made up of parallel three phase capacitor C and their protector FU; Multifunctional controller 5 is made up of signal sampling circuit control circuit, execution and diverter circuit, motor operation troubles sensor circuit, failure indicating circuit and power circuit.Wherein sample circuit is three groups, and they are made of mutual inductor KFtv1 commutation diode D1, filter capacitor C1, resistance R 1 and signal amplifying triode BG respectively; Control circuit is to be made of than time-delay and drive integrated circult IC1 signal processing drive integrated circult, IC2 voltage ratio; Carry out with diverter circuit and finish by relay K F1, KF2; Motor operation troubles sensor circuit is made of mutual inductor KFtv2, commutation diode D2, overload regulator potentiometer W1 and resistance R 3, R2; Failure indicating circuit is finished by LED1-LED4.

The utility model owing to adopted the vacuum switch circuit, primary component is reduced to four from 11 of the prior art, has improved the reliability of vacuum control case greatly on circuit structure; Multifunctional controller has automatic protection functions, the delayed firing function of the phase failure, short circuit, overload, under-voltage and electric leakage, and itself is highly sensitive, Installation and Debugging are fast convenient; The pumping unit local compensation is adopted in reactive-load compensation, has excellent self-healing performance, the medium partial breakdown that causes because of overvoltage occasionally, can self-healing in several microseconds, in explosion-proof device is housed, can cut off the electricity supply automatically when being out of order.This vacuum control case has exceeded 3-5 doubly than general control case working life; Twice of the annual maintenance of pumping unit electrical appliance part in the prior art, adopt that burst is operated a switch, every mouthful of well average a year stopping production 2-3 days, according to every mouthful of well oil output 8-10 ton/sky, to lack oil output every year and can calculate; The utility model reliability height, non-maintaining in can 3 years, and every mouthful of well can be produced 50-60 ton crude oil more in 3 years; The Cost of repair and maintenance of this control box is the sixth of general control case; Its distinguishing feature is that self power consumption is 27W/h, and existing control box self power consumption 160-180W/h, 1252.68 degree so annual every control box on average economizes on electricity

Description of drawings of the present utility model:

Fig. 1 is a pumping unit vacuum control case functional-block diagram.

Fig. 2 is a pumping unit vacuum control case electrical schematic.

Fig. 3 is the multifunctional controller circuit theory.

In conjunction with the accompanying drawings the circuit structure and the working principle thereof of this vacuum control case are made a detailed description:

As shown in Figure 1: this vacuum control case is to introduce circuit 2, vacuum switch circuit 3, reactive power compensation circuit 4 and motor of oil extractor 6 with this preface series connection by power circuit 1, power supply, and at vacuum switch circuit control end and uncompensated circuit output end and be connected to multifunctional controller 5 and constitute, as shown in Figure 2: QF is that power supply is introduced circuit, vacuum switch circuit 3 is by main control coil K, main switch K0 and pays and help K switch 01 to form; Reactive power compensation circuit 4 is made up of parallel three phase capacitor C and their protector FU thereof; As shown in Figure 3: multifunctional controller 5 (being KF-6) comprises signal sample circuit, control circuit, execution and diverter circuit, motor operation troubles sensor circuit, failure indicating circuit and power circuit.Wherein signal sample circuit is three groups, they are made of mutual inductor KFtv1, commutation diode D1, filter capacitor C1, resistance R 1 and signal amplifying triode BG respectively; Control circuit is the signal processing drive circuit that is formed by IC1 intergrated circuit, diode D4, D5 and peripheral element thereof, and the voltage ratio of the formation such as current potential detection that IC2 intergrated circuit and C6, R13 and D10, R15, C5, D9 form is delayed time and drive circuit constitutes; Carry out with diverter circuit and constitute by relay K F1, KF2; Motor operation troubles sensor circuit is made of mutual inductor KFtv2, rectifier lamp D2, overload regulator potentiometer W1 and resistance R 2, R3; Failure indicating circuit is to be finished by LED1-LED4; Power circuit is made up of transformer B, bridge rectifier D11-D14 and capacitor C 8.

The working principle of vacuum control case: referring to Fig. 2,3, when connecting power supply introducing circuit QF, manual state, press start button SBst, throw over switch KA is connected to P1, make control coil K energising, electromagnetic force is with vacuum switch K1 and K01 adhesive, and motor M brings into operation, capacitor C local compensation, discharge by stopping knob SB0 vacuum switch K0, motor M quits work.During auto state, throw over switch KA is connected to P2, and when grid power blackout, controller (KF-6) time-delay KF2 make contact after 30 seconds brings into operation motor M.

When the motor three phase mains just often the induced voltage that produced of voltage transformer KFtv through diode D1, D2, D10 and capacitor C 1, C5 rectifying and wave-filtering, triode BG saturation conduction, the A point is in high petential, D4 is instead ended partially, IC 1 output is in low potential, and relay K F1 is failure to actuate.The C end of IC 1 is in high petential; LED3 moves indication; when the phase failure, electric leakage appear in power supply; the non-inductive voltage of voltage transformer KFtv, triode BG ends, and the A point is in low potential; diode D4 conducting; the output terminal D of IC 1 is in high petential, and relay K F1 protects action, and luminotron tube LED1 pipe is indicated.

When motor M appearance overload, during short circuit, the induced voltage that voltage transformer KFtv is produced exceeds normal value; signal is through the D2 rectification; W1 regulates overload quantity, sends into IC 1 by R3, forces the intergrated circuit upset; relay K F1 protects action; regulated by W2 actuation time, and simultaneously, LED2 transships; or the short circuit indication, buzzer YD reports to the police.

When line voltage is lower than normal value; signal detects through the input voltage that diode D10, R15, C5 form; W3 sets predetermined protection value; through diode D9; make the E end of IC 2 be in low potential; the intergrated circuit upset discharges relay K F2 and protects action, and LED4 carries out under-voltage indication.

Claims

1, a kind of pumping unit vacuum control case, comprise: power circuit (1), power supply insertion switch circuit (2), reactive power compensation circuit (4) motor of oil extractor (6) is characterized in that being connected in series a vacuum switch circuit (3) with the reactive power compensation circuit input end at power supply insertion switch circuit output end; At vacuum switch circuit control end and reactive power compensation circuit output terminal and be connected to multifunctional controller (5), make its control end insert motor of oil extractor (6).

2, pumping unit vacuum control case according to claim 1 is characterized in that vacuum switch circuit (3) is by control coil K, main switch K0 and pay and to help K switch 01 to form.

3, pumping unit vacuum control case according to claim 1 is characterized in that reactive power compensation circuit (4) is made up of parallel three phase capacitor C and their protector FU.

4, according to claim 1,2 or 3 described pumping unit vacuum control casees, it is characterized in that multifunctional controller is made up of signal sample circuit, control circuit, execution and diverter circuit, motor operation troubles sensor circuit, failure indicating circuit and power circuit, wherein sample circuit is three groups, and they are made of mutual inductor KFtv1, commutation diode D1, filter capacitor C1, resistance R 1 and signal amplifying triode BG respectively; Control circuit is to be made of than time-delay and drive circuit ic chip 1 signal processing drive circuit, IC2 voltage ratio; Carry out with diverter circuit and constitute by relay K F1, KF2; Motor operation troubles sensor circuit is to be made of mutual inductor KFtv2, commutation diode D2, overload regulator potentiometer W1 and resistance R 3, R2; Failure indicating circuit is made of LED1-LED4.